As T LEE said.
You move the front sight the opposite way you want the bullet to go. If you want to move the bullet up, lower the front sight - and viceversa.
However, in your case, I'd decide on what load I wanted to shoot and send it back to Ruger explaining your problem and which load you are planning on shooting in it and they should adjust it for you. That way, no filing, reblueing, etc.
